Scale



Dec. 23, 1952 A. VAN DUYN 2,522,933

' SCALE Filed May 28, 1948 2 SHEETS-SHEET 1 Patented Dec. 23, 19572 UNI-rco .similaires Netherlands, ass'ignor to U.1 S. SlicingMachine riCompany, Inc.,lLaPorte,lnd.,;af corporation :of

Indiana ApplicationMay'ZS, 19.48,' Serial No.`29,711

lfthe ANetherlands June/5, 194'7 This invention relates -to weighing-apparatus of `theltype having -a weighbeam, `and arp-latter support carried'by fthe weighbeam- `More yspecicallyftheinven-tion relates-to-agscale of that typeof weighing-scale'inwhich there -is Aknife- -edge' bearing means providing foroper-atifve movement ofthe apparatus, and check-linkV means-for Vcontrolling said operative movement.

A disadvantage varises lin conventional Vvsca-les when Yafloadlis placedfat a position on ther scale -platter-.orfpiatform 'other thanat the-center of A the platter, because of inaccuracy in thenishing of fthe .check-links, Lincorrect adjustment of the check-links, `or the presence of play in the fulcrums thereof, whereupon a knife of the bearing means will become moved relative to its resting or true working position. 'As aconsequence of such movement of the knifeth'e apparatus does not weigh properly, ince the -platter with its support will exercise a tilting movement about the pivotal mounting of the support on the-Weighbeam.

.'An important object of the :present .invention .is lto -obviate the inherent disadvantages y:applicable tolconventional*weighingscales bylt'hefpro- .vision offnew and `improved adjustment means .for vmaintainingatrue -working relationship fbetween. certainknife. bearingsland their cooperating rests, should-:cornerloadingof the scale platter occur.

Another important object `is the provision 'of novel means, and Aan arrangement thereof, to overcome the occurrence of certain inaccuracies, or to provide compensating means in cases Where inaccuracies in the check links tend to cause the knife bearings, and their associated knife bearing rests, to fall out of proper engagement with each other during operation of the Weighing apparatus.

A further important object of the invention is to provide a weighbeam carrying knife-edged or V-shaped bearing members, one of said bearing members adapted to carry the load from the scale platform or platter and another of the said bearing members functioning as a fulcrum about which the weighbeam may have p-ivotal movement, and having means for adjustment of one of the bearing rests in a direction transverse to the axes of the knife-edged bearing members, so that the knife-edged bearing members and their respective cooperating rests will remain in true v rpointeri is displaceable.

axis Se.

-aplatform ori platter supporti I.

.2 The accompanying drawings .represent 'fa fse- .lected embodiment'ofthe invention and the .views .therein are-as :follows:

4Fig. lis a sectionalielevation .of ;;a Weighing apparatus embodying the invention.

Fig..2 is adetailsectionalview of the adjustment means shown in Fig. l, and

.Figsg :to,6, inclusive, are diagrammatic lviews :of fourzfurther 'embodiments .of lthe .invention.

;The'weighing apparatus fhereinxshown for the purpose of illustratinglth'e :inventioni comprises a fan-shaped indication v:chart I kover which a Thel pointer/2 is connected'xedly itofavcam disc 3 whichiis-mounted onca knife-edge bearingv for rotation'about 4an pendulum' weight :'5 is v'carried Yhy the disc :'to whichaf-steei'band is arranged. The band @carries-admit .-'I at 'its lower end `which engagesva-k-nifg "on va -weighloeaml` 9.

The -usual-platform-or platter HIii is carried by A pair of :check links ,I2 .and rI'3 for :the support II ihave fixed ffulcrums atlland`I:5,respectively; thesezcheck .links are .pivotally connected to the `platter-.support i Iat I -and VI, `respectively. (Fig. iishows 'therloiveriink it; as bein'gp-ivotally connected .to `The "said lfulcrums It through I I .consist of :knives andl knife rests.

A knife-edge bearing `isi'providedat the'lower iiendeo 1 the support I I :iThs bearingconsists of lknitez: rest ;I:3,Jand correspondsiwith the 'knife I 9 .on the'zweighbeamlasas shown in Fig. 1. .zr-ln adjustment devicerconsis'ts of a lower rounded edge on the sup-port II that is slidable in a corresponding groove 2 which is formed in the knife rest I, as shown clearly in Fig. 2. The said rounded edge 0n the support II extends above and parallel to the Weighbeam 9 and is complementally received in the groove 2i), the support I I having the spaced abutment formation shown in Fig. l for limiting sliding movement.

The weighbeam 9 fulcrums about a knife-edge bearing which consists of a knife 2i, which is located on knife rest 22 carried by a fixed block 23. If the check-links I2 and I3 are inaccurately finished, or spaces exist in the fulcrums of the check-links I2 and I3 due to wear and tear or the like, and the platform or platter I is loaded ofi its center, then the support I I will be displaced over a small distance in a direction transversely of the longitudinal axes of the knife-edge bearings I9 and 2i by a push or pull acting through the lower link I3, the particular direction depending on which side of the center of the platter the loading takes place. This displacement varies 3 in accordance with the distance oi the load from the middle of the platter.

By this arrangement, the knife i9 is prevented from sliding out of its rest I8; in other words, the knife and its rest will remain in true working relationship to each other. Sliding out action would certainly occur if the rest I8 were connected to the support l I in the usual manner.

The Weighbeam 9, Fig. 3, is adjustable in a di'- rection transverse to the axes of the knife-edge bearings by virtue of sliding movement of the knife 24 Ialong a flat knife rest 25 which constitutes an adjustment device. In Fig. 4, the knife rest 26 is pivotally connected at 26A to the platter support Il, said pivotal connection 26A constituting the adjustment device. In Fig. 5, the main bearing 21 is displaceable on rollers 28 which constitute the adjustment device. Fig. 6 is similar to Fig. 5, but with the difference that the lower link I3 is connected at 29 to the weighbeam 9 instead of to the platter support ll.

All of the foregoing embodiments have in view the automatic adjustment of the weighbeam, or the platter support, in the event of corner loading when there is space in the fulcrums of the links, or when there is incorrect adjustment of the links.

Although the embodiments shown in the drawings are concerned with Weighing apparatus having a fan-shaped indicating chart, nevertheless it will be clear that the invention is applicable to other known types of apparatus.

Changes may be made in the form, construction and arrangement of parts without departing from the spirit of the invention or sacrificing any of its advantages, and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

The invention is hereby claimed as follows:

1. A weighing scale comprising a movable support for a weighing platter, a weighbeam, a knifeedge bearing and a bearing seat between said support and said weighbeam, said support and said bearing seat having complementally interfitting groove and slide formations arranged for relative sliding movement in a direction transverse of the longitudinal axis of the knife-edge bearing, and check link means connected to said support to control its movement.

2. A weighing scale comprising a movable support for a weighing platter, -a weighbeam, a knifeedge bearing and a bearing seat between said support and said weighbeam, said support being formed with an edge portion extending above and parallel to said weighbeam, and said bearing seat havingr a groove complementally receiving the said edge portion of the support for relative sliding movement in a direction transverse of the longitudinal axis of the knife-edge bearing, and check link means connected to said support to control its movement.

3. A weighing scale comprising a Imovable support fora weighing platter, a Weighbeam, a knifeedge bearing and a bearing seat between said support and said Weighbeam, said support being formed with a portion having a rounded edge extending above and parallel to said weighbeam and an abutment at each end of the rounded edge, and said bearing seat having a groove complementally receiving the rounded edge of the support for relative sliding movement in la direction transverse of the longitudinal axis of the knifeedge bearing, and check link means connected to said support to control its movement.

4. A weighing scale comprising a movable support for a Weighing pl-atter, a weighbeam, a knifeedge bearing member and a bearing seat member disposed between said support and said weighbeam, with the bearing member carried by one and the seat member by the other, said support and the member carried by it having complementally interiitting groove and slide formations arranged for relative sliding movement in a direction transverse of the longitudinal axis of the knife-edge bearing, and check link means connected to said support to control its movement.

ADRIANUS VAN DUYN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date '751,018 Selley Feb. 2, 1904 901,994 Ostendorf Oct. 27, 1908 924,962 Boling June 15, 1909 1,032,439 Templeton July 6, 1913 1,229,449 Hapgood J-une 12, 1917 1,706,977 Hurt Mar. 26, 1929 2,159,684 Bennett May 23, 1939 FOREIGN PATENTS Number Country Date 69,315 Germany June 19. 1893 

